<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: FilesSize.php 18148 2009-09-16 19:27:43Z thomas $
 */

/**
 * @see Zend_Validate_File_Size
 */
require_once 'Zend/Validate/File/Size.php';

/**
 * Validator for the size of all files which will be validated in sum
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate_File_FilesSize extends Zend_Validate_File_Size
{
	/**
	 * @const string Error constants
	 */
	const TOO_BIG      = 'fileFilesSizeTooBig';
	const TOO_SMALL    = 'fileFilesSizeTooSmall';
	const NOT_READABLE = 'fileFilesSizeNotReadable';

	/**
	 * @var array Error message templates
	 */
	protected $_messageTemplates = array(
	self::TOO_BIG      => "All files in sum should have a maximum size of '%max%' but '%size%' were detected",
	self::TOO_SMALL    => "All files in sum should have a minimum size of '%min%' but '%size%' were detected",
	self::NOT_READABLE => "One or more files can not be read"
	);

	/**
	 * Internal file array
	 *
	 * @var array
	 */
	protected $_files;

	/**
	 * Sets validator options
	 *
	 * Min limits the used diskspace for all files, when used with max=null it is the maximum filesize
	 * It also accepts an array with the keys 'min' and 'max'
	 *
	 * @param  integer|array|Zend_Config $options Options for this validator
	 * @return void
	 */
	public function __construct($options)
	{
		$this->_files = array();
		$this->_setSize(0);

		if ($options instanceof Zend_Config) {
			$options = $options->toArray();
		} elseif (is_scalar($options)) {
			$options = array('max' => $options);
		} elseif (!is_array($options)) {
			require_once 'Zend/Validate/Exception.php';
			throw new Zend_Validate_Exception('Invalid options to validator provided');
		}

		if (1 < func_num_args()) {
			// @todo: Preperation for 2.0... needs to be cleared with the dev-team
			//          trigger_error('Multiple constructor options are deprecated in favor of a single options array', E_USER_NOTICE);

			$argv = func_get_args();
			array_shift($argv);
			$options['max'] = array_shift($argv);
			if (!empty($argv)) {
				$options['bytestring'] = array_shift($argv);
			}
		}

		parent::__construct($options);
	}

	/**
	 * Defined by Zend_Validate_Interface
	 *
	 * Returns true if and only if the disk usage of all files is at least min and
	 * not bigger than max (when max is not null).
	 *
	 * @param  string|array $value Real file to check for size
	 * @param  array        $file  File data from Zend_File_Transfer
	 * @return boolean
	 */
	public function isValid($value, $file = null)
	{
		require_once 'Zend/Loader.php';
		if (is_string($value)) {
			$value = array($value);
		}

		$min  = $this->getMin(true);
		$max  = $this->getMax(true);
		$size = $this->_getSize();
		foreach ($value as $files) {
			// Is file readable ?
			if (!Zend_Loader::isReadable($files)) {
				$this->_throw($file, self::NOT_READABLE);
				continue;
			}

			if (!isset($this->_files[$files])) {
				$this->_files[$files] = $files;
			} else {
				// file already counted... do not count twice
				continue;
			}

			// limited to 2GB files
			$size += @filesize($files);
			$this->_setSize($size);
			if (($max !== null) && ($max < $size)) {
				if ($this->useByteString()) {
					$this->setMax($this->_toByteString($max));
					$this->_throw($file, self::TOO_BIG);
					$this->setMax($max);
				} else {
					$this->_throw($file, self::TOO_BIG);
				}
			}
		}

		// Check that aggregate files are >= minimum size
		if (($min !== null) && ($size < $min)) {
			if ($this->useByteString()) {
				$this->setMin($this->_toByteString($min));
				$this->_throw($file, self::TOO_SMALL);
				$this->setMin($min);
			} else {
				$this->_throw($file, self::TOO_SMALL);
			}
		}

		if (count($this->_messages) > 0) {
			return false;
		}

		return true;
	}
}
